[andy-tracking] poweroff is broken

[Klaus Kurzmann]

Hello,

with current andy-tracking (e142549d884a17b81b4c87de8ab116bd8b1df03c)
poweroff seems to be broken. After initiating shutdown with one of:
- poweroff
- shutdown -h now
- shutdown -h -P now

last line seen on screen is:
System halted.

but the device (GTA02) does not power off.

mrmoku